Joel R. Tetreault, Jill Burstein, Ekaterina Kochmar, Claudia Leacock, Helen Yannakoudakis: Proceedings of the Thirteenth Workshop on Innovative Use of NLP for Building Educational Applications@NAACL-HLT 2018, New Orleans, LA, USA, June 5, 2018. Association for Computational Linguistics 2018, ISBN 978-1-948087-11-7